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Changing Antlr build options in workflow? [message #1140764]

Wed, 16 October 2013 15:45

Steve Jones

Messages: 95
Registered: July 2009

Member

Hi,

Is it possible to change the Antlr build options from the workflow definition?

Specifically I'd like to enable the Antlr -trace option so I can see which grammar rules are being invoked.

Thanks, Steve

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Re: Changing Antlr build options in workflow? [message #1140863 is a reply to message #1140764]

Wed, 16 October 2013 17:13

Steve Jones

Messages: 95
Registered: July 2009

Member

Hi,

You can add Antlr command line parameters to the mwe2 workflow file as follows:

// The antlr parser generator fragment.
fragment = parser.antlr.XtextAntlrGeneratorFragment auto-inject {
antlrParam = "-trace"
// options = {
// backtrack = true
// }
}

The trace option results loads of trace statement that will help in tracking the parsers progress, eg:

enter ruleAAAA [@3,8:8='(',<48>,1:8]
enter ruleBBBB [@3,8:8='(',<48>,1:8]
enter ruleCCCC [@4,9:9=')',<49>,1:9]
exit ruleBBBB [@4,9:9=')',<49>,1:9]
...

Cheers, Steve

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